Results 41 to 50 of about 41,805 (255)
Multi-Dimensional Impactor and Its Application
Shiyou jixie, 2020 The multi-dimensional impactor is an axial and torsional composite impacting drilling tool, and its impact load is fixed in the axial and torsional direction. In order to improve the performance of the tool in different formations, technical improvements
Liu Shubin +3 more
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Nigerian Journal of Paediatrics, 2021 Background Improvement in neonatal services across Africa has led to increased survival of preterm and low birth weight neonates with consequent rising incidence of ROP.
Obumneme B Ezeanosike +4 more
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High-Temperature Alkali Vapor Cells with Anti-Relaxation Surface Coatings
, 2009 Antirelaxation surface coatings allow long spin relaxation times in alkali-metal cells without buffer gas, enabling faster diffusion of the alkali atoms throughout the cell and giving larger signals due to narrower optical linewidths.
Corney A., M. V. Romalis, S. J. Seltzer
core +1 more source
Knot Tightening By Constrained Gradient Descent [PDF]
, 2010 We present new computations of approximately length-minimizing polygons with fixed thickness. These curves model the centerlines of "tight" knotted tubes with minimal length and fixed circular cross-section.
Ashton, Ted +3 more
core +2 more sources
Atomic Layer Deposition in Transistors and Monolithic 3D Integration
Advanced Functional Materials, EarlyView.Transistors are fundamental building blocks of modern electronics. This review summarizes recent progress in atomic layer deposition (ALD) for the synthesis of two‐dimensional (2D) metal oxides and transition‐metal dichalcogenides (TMDCs), with particular emphasis on their enabling role in monolithic three‐dimensional (M3D) integration for next ...
Yue Liu +5 more
wiley +1 more source
Serum VEGF levels in infants at risk for developing retinopathy of prematurity
Journal of Ophthalmology, 2019 Background: Because excessive growth of abnormal retinal vessels in the developing eye of the premature infant underlies retinopathy of prematurity (ROP), it may be hypothesized that a change in vascular endothelial growth factor (VEGF) level in the ...
S.V. Katsan, S.G. Fedotova
doaj +1 more source
Advanced Healthcare Materials, EarlyView.Myocardial infarction often leads to pathological remodelling and ventricular dilatation, key features of HFrEF. This study introduces a personalized, 3D‐printed cardiac restraint device (CARD) printed using rationally designed inks displaying the requested printability and mechanical properties.
Nicola Mansour +6 more
wiley +1 more source
Exploring the features of keratometry readings in premature children
Journal of Ophthalmology, 2021 Background: It is important for pediatric ophthalmologists to explore the keratometry parameters used in selection of contact lenses (and thus to improve visual function, quality of life, and treatment of complications of refractive errors) in premature ...
I. A. Soboleva, Y. Y. Borysenko
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Vat Polymerization 3D Printing for Controlled Drug Release Applications
Advanced Materials Technologies, EarlyView.ABSTRACT Vat polymerization (VP) 3D printing, a light‐based additive manufacturing technique, has emerged as a promising technique for fabricating complex drug delivery systems with high precision and spatial resolution. This layer‐by‐layer manufacturing process enables the creation of intricate geometries and customizable architectures, which are ...
Hafiz Busari +2 more
wiley +1 more source
Vanadium(v) phenolate complexes for ring opening homo- and co-polymerisation of ε-caprolactone, L-lactide and rac-lactide [PDF]
, 2015 The vanadyl complexes [VO(OtBu)L¹ ] (1) and {[VO(OiPr)]₂ (μ-p-L²ᵖ)} (2) {[VO(OR)]₂ (μ-p-L²ᵐ )} (R = iPr 3, tBu 4) have been prepared from [VO(OR)₃ ] (R = nPr, iPr or tBu) and the respective phenol, namely 2,2′-ethylidenebis(4,6-di-tert-butylphenol) (L¹ ...
Al-Khafaji, Yahya +6 more
core +2 more sources